Nitrogen efficiency in wheat yield through the biopolymer hydrogel

ABSTRACT Nitrogen use efficiency in wheat biomass and grain yields can be favored by the biopolymer hydrogel. The objective of the study was to analyze the use of the biopolymer hydrogel applied to the seed in the optimization of fertilizer-N on wheat biomass and grain yields, under different conditions of agricultural year and succession systems of high and reduced release of residual-N. In the study, two experiments were conducted, with different farming systems, soybean/wheat and maize/wheat, one to quantify the biomass yield rate and the other to determine grain yield. The experiments were conducted in the years 2014 and 2015, in a randomized block design with four replicates in a 4 x 4 factorial scheme, corresponding to hydrogel doses (0, 30, 60 and 120 kg ha-1) added in the groove along with the seed and N fertilizer rates (0, 30, 60 and 120 kg ha-1), applied as top-dressing. It is possible to improve the fertilizer-N efficiency by wheat using the biopolymer hydrogel for the production of biomass and grains. The highest wheat yield per kilogram of N supplied is obtained with 30 and 60 kg ha-1 of hydrogel, regardless of the year and succession system.

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MORPHOLOGICAL AND PRODUCTIVE CHARACTERIZATION OF FORAGE CACTUS VARIETIES

Revista Caatinga ◽

10.1590/1983-21252015v28n326rc ◽

2015 ◽

Vol 28 (3) ◽

pp. 230-238 ◽

Cited By ~ 2

Author(s):

PHILIPE LIMA DE AMORIM ◽

JANAINA AZEVEDO MARTUSCELLO ◽

JOSÉ TEODORICO DE ARAÚJO FILHO ◽

DANIEL DE NORONHA FIGUEIREDO VIEIRA DA CUNHA ◽

LIANA JANK

Keyword(s):

Block Design ◽

Morphological Characteristics ◽

Correlation Coefficients ◽

Dry Mass ◽

Negative Effects ◽

Breeding Programs ◽

Area Index ◽

Promising Alternative ◽

Randomized Block Design ◽

Use Efficiency

ABSTRACT: Cultivars of the genus Nopalea are known in Brazil for being tolerant to cochineal carmine attacks, thus making the cultivation of this genus a promising alternative for mitigating the negative effects of this insect on the production of biomass. With the objectives of characterizing morphologically spineless forage cactus varieties and identify morphological characteristics that may be the focus in spineless forage cactus breeding programs, an experiment was conducted in a completely randomized block design with 11 treatments and four replications. The variety Alagoas showed the highest values of weight, area and volume of cladodes. The varieties Negro Michoacan F7 and V7, Tamazunchale V12 showed the highest values of the cladode area index, the total volume of cladodes and total fresh mass production. The varieties Negro Michoacan V7 and F7 presented the highest water use efficiency and dry mass yield. Cladode volume showed the highest correlation coefficients with the fresh weight of cladodes. Aiming the release of varieties for biomass production, varieties Negro Michoacan F7, V7 and Tamazunchale V12 may substitute the Miúda variety. The number and cladode area index may be used as criteria for selection of superior varieties in breeding programs.

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Single and split nitrogen dose in wheat yield indicators

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v22n1p16-21 ◽

2018 ◽

Vol 22 (1) ◽

pp. 16-21 ◽

Cited By ~ 2

Author(s):

Juliane S. P. Costa ◽

Rubia D. Mantai ◽

José A. G. da Silva ◽

Osmar B. Scremin ◽

Emilio G. Arenhardt ◽

...

Keyword(s):

Block Design ◽

Wheat Yield ◽

N Use Efficiency ◽

Phenological Stages ◽

Split Dose ◽

N Supply ◽

N Release ◽

Residual N ◽

Use Efficiency ◽

N Use

ABSTRACT Single or split nitrogen (N) supply can maximize the expression of wheat yield indicators. The objective of the study was to evaluate the greater N use efficiency on wheat yield indicators by the single and split N supply under favorable and unfavorable year conditions to the crop in succession system of high and reduced residual N release. The study was conducted in 2014 and 2015, in a randomized complete block design with four replicates in a 4 x 3 factorial, for N-fertilizer doses (0, 30, 60, 120 kg ha-1) and supply forms [full dose (100%) in the phenological stage V3 (third expanded leaf); split dose (70 and 30%) in the phenological stages V3/V6 (third and sixth expanded leaves, respectively) and; split dose (70 and 30%) in the phenological stages V3/R1 (third expanded leaf and early grain filling)], respectively, in soybean/wheat and maize/wheat cultivation systems. The highest N use efficiency for wheat yield was obtained with the single dose supply in favorable year of temperature and rainfall and with the split dose in the V3/V6 stages in unfavorable year, regardless of the succession system of high and reduced residual N release.

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Identification of Economically Viable Cropping Systems for Vertisols of Northern Telangana Zone

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i3431040 ◽

2020 ◽

pp. 98-106

Author(s):

Firdoz Shahana ◽

M. Goverdhan ◽

S. Sridevi ◽

B. Joseph

Keyword(s):

Cropping Systems ◽

Block Design ◽

Cropping System ◽

Farming Systems ◽

Research Station ◽

Bt Cotton ◽

Black Gram ◽

Net Returns ◽

Lower Productivity ◽

Randomized Block Design

A field experiment was conducted during 2016-17 at AICRP on Integrated Farming Systems, Regional Sugarcane and Rice Research Station, Rudrur to diversify existing rice-rice cropping system with less water requiring crops under irrigated dry conditions for vertisols of Northern Telangana Zone. The experiment was laid out with twelve cropping systems as treatments in Randomized Block Design (RBD) with three replications. The twelve combinations of cropping systems tested during kharif and rabi seasons were rice – rice (check), maize + soybean (2:4) – tomato, maize + soybean (2:4) - rice, maize - sunflower + chickpea (2:4), maize - chickpea, Bt cotton + soybean (1:2) on broadbed – sesame + groundnut (2:4), Bt cotton - sesame + blackgram (2:4), soybean – wheat, soybean – sunflower + chickpea (2:4), turmeric – sesame, turmeric + soybean (1:2) on flat bed – bajra and turmeric + soybean (1:2) on broadbed – sesame + blackgram (2:4). On system basis, significantly higher productivity in terms of rice equivalent yield (REY) of 23830 kg ha-1 was recorded with turmeric+soybean (1:2) BBF– sesame+blackgram (2:4) turmeric – sesame cropping sequence. However it was on par with turmeric – sesame and turmeric + soybean (1:2) on flat bed – bajra crop sequence with productivity of 23332 kg ha-1 and 21389 kg ha-1 respectively. Lower productivity was recorded with rice-rice cropping system (10725 kg ha-1). Significantly higher system net returns were recorded with Bt. cotton – sesame + black gram (2:4) on BBF (Rs222838 ha-1) closely followed by Bt Cotton + Soybean (1:2) (BBF) - Sesamum + Groundnut (2:4) (Rs221160 ha-1) and Maize+soybean (2:4)–tomato (Rs212909 ha-1). Lower system net returns were recorded in conventional rice-rice system (Rs88179 ha-1). Bt. cotton – sesame + black gram (2:4) and Bt Cotton + Soybean (1:2) (BBF)- Sesamum + Groundnut ((2:4) and Maize+soybean (2:4)–tomato were economically superior with REE of 152.71%, 150.81% and 141.45%. Rice- Rice cropping adopted by majority of farmers is less productive and economically inferior indicating wider scope of diversifying existing rice- rice cropping system with high productive, economically viable cropping systems in vertisols of Northern Telangana Zone.

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EFEITO DE DIFERENTES LÂMINAS DE IRRIGAÇÃO NAS VARIÁVEIS DE DESENVOLVIMENTO E PRODUÇÃO DO CAFEEIRO IRRIGADO POR PIVÔ CENTRAL

Irriga ◽

10.15809/irriga.2015v20n3p528 ◽

2015 ◽

Vol 20 (3) ◽

pp. 528-543 ◽

Cited By ~ 1

Author(s):

Marcelo Rossi Vicente ◽

Everardo Chartuni Mantovani ◽

ANDRÉ LUÍS TEIXEIRA FERNANDES ◽

FÁBIO TEIXEIRA DELAZARI ◽

EDMILSON MARQUES FIGUEREDO

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Coffea Arabica ◽

Block Design ◽

Irrigation Management ◽

Randomized Block Design ◽

Center Pivot ◽

Irrigation Depth ◽

Use Efficiency ◽

Level Of Significance

EFEITO DE DIFERENTES LÂMINAS DE IRRIGAÇÃO NAS VARIÁVEIS DE DESENVOLVIMENTO E PRODUÇÃO DO CAFEEIRO IRRIGADO POR PIVÔ CENTRAL MARCELO ROSSI VICENTE1; EVERARDO CHARTUNI MANTOVANI2; ANDRÉ LUÍS TEIXEIRA FERNANDES3; FÁBIO TEIXEIRA DELAZARI4 E EDMILSON MARQUES FIGUEREDO5 1 Instituto Federal do Norte de Minas Gerais, Salinas, MG, [email protected] Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG, [email protected] Universidade de Uberaba, Uberaba, MG, Fábio Teixeira Delazari, [email protected] Departamento de Fitotecnia, Universidade Federal de Viçosa, Viçosa, MG, [email protected] Bahia Farm Show, Luís Eduardo Magalhães, BA, [email protected] 1 RESUMO O presente trabalho foi conduzido com objetivo de avaliar o efeito de diferentes lâminas de irrigação nas variáveis de produção, estádios maturação de frutos e eficiência no uso da água pela cultura do cafeeiro irrigado por pivô central equipado com emissores LEPA, na região Oeste da Bahia. Realizou-se o trabalho na fazenda Café do Rio Branco, localizada em Barreiras - BA em cafeeiros adultos da variedade Catuaí IAC 144. O experimento obedeceu ao delineamento de blocos casualizados, composto de cinco tratamentos correspondentes à 70, 85, 100, 125 e 150% da lâmina de irrigação determinada pelo software Irriplus. As produtividades, os estádios de maturação dos frutos e eficiência no uso da água do cafeeiro foram submetidos à análise de variância e regressão, em que os modelos foram escolhidos baseados na significância dos coeficientes de regressão utilizando-se o teste t de 1 a 10% de probabilidade. Diante dos resultados obtidos, pode-se concluir que, a produtividade da cultura do café foi expressivamente dependente da lâmina de água aplicada, sendo que a maior produtividade (60 sc ha-1) foi alcançada com a lâmina de irrigação acumulada de 661 mm ano-1, correspondente à 96% da lâmina de irrigação determinada pelo software Irriplus. A lâmina que proporcionou a máxima porcentagem de frutos cereja (44,1%) foi de 723 mm ano-1 (105%). A lâmina que proporcionou a maior eficiência no uso da água foi de 480 mm ano-1 (70%). Palavras-Chave: Coffea arabica, manejo da irrigação, emissor LEPA, uso eficiente da água. VICENTE, M. R.; MANTOVANI, E. M.; FERNANDES, A. L. T.; DELAZARI, F. T.; FIGUEREDO, E. M.EFFECTS OF DIFFERENT LEVELS OF IRRIGATION DEPTHS ON GROWTH AND PRODUCTION VARIABLES OF COFFEE UNDER CENTER PIVOT IRRIGATION 2 ABSTRACT This study aimed to evaluate the effect of different irrigation depths on yield, ripening stages and water use efficiency by the coffee crop irrigated by center pivot with LEPA emitters in western Bahia. The experiment was carried out at the Café Rio Branco farm, in Barreiras city, Bahia state, using adult coffee trees of cv. Catuaí IAC 144. A completely randomized block design was used with five treatments consisting of 70, 85, 100, 125 and 150 % of ETc, determined by the Irriplus software. Data of yield, fruit ripening stage and water use efficiency were evaluated using analyses of variance and regression. Models were chosen based on level of significance of regression coefficients using the Student´s t-test, 1 to 10% probability. Based on the results, coffee crop yield was highly dependent on the water depth applied. The highest yield (3.6 ton/ha) was achieved using accumulated irrigation depth of 661 mm year -1 (96 % of Etc). Water depths of 723 mm year-1 (105 %) and 480 mm year-1 (70% ETc) provided the highest percentage of cherry fruit (44.1%) and the highest water use efficiency, respectively. Keywords: Coffea arábica, irrigation management, LEPA emitter, water use efficiency.

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Agronomic Performance of Soybean With Seeds Treated With an Algae Extract Base Biostimulant

Journal of Agricultural Science ◽

10.5539/jas.v13n1p147 ◽

2020 ◽

Vol 13 (1) ◽

pp. 147

Author(s):

Gabriel Bressiani Melo ◽

Alessandro Guerra da Silva ◽

Adriano Perin ◽

Guilherme Braga Pereira Braz ◽

Christiano Lima Lobo de Andrade

Keyword(s):

Grain Yield ◽

Block Design ◽

Natural Compounds ◽

Soybean Seeds ◽

Agronomic Performance ◽

Grain Yields ◽

Beneficial Effects ◽

Agronomic Characteristics ◽

Organic Components ◽

Randomized Block Design

The use of biostimulants in the treatment of soybean seeds can provide beneficial effects on the crop due to the synergism between the organic components present in products from natural compounds. Due to the scarcity of results of research on biostimulants in the treatment of soybean seeds, the objective of this study was to evaluate the effects of doses of a biostimulant in the treatment of seeds, on agronomic characteristics, productivity components and profitability of soybean culture. Therefore, two experiments were carried out in the field in the 2016/17 and 2017/18 harvests, using a randomized block design with six replications and four treatments referring to doses of 0.00; 0.05; 0.10; and 0.15 L 100 kg seeds-1. The agronomic characteristics of soybeans, grain yield and profitability of using the biostimulant were evaluated. From the obtained results, it can be seen that the dose of 0.15 L 100 kg seeds-1 provided greater profitability in both harvests. In addition, doses above 0.12 L 100 kg seed-1 provide higher grain yields and a higher grain mass, in addition to other productivity components.

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RESPON LIMA AKSESI JAHE PUTIH KECIL (Zingiber officinale var. Amarum) TERHADAP PEMUPUKAN

Jurnal Penelitian Tanaman Industri ◽

10.21082/jlittri.v18n2.2012.66-73 ◽

2020 ◽

Vol 18 (2) ◽

pp. 66

Author(s):

MUCHAMAD YUSRON ◽

CHEPPY SYUKUR ◽

OCTIVIA TRISILAWATI

Keyword(s):

Growth Parameters ◽

Block Design ◽

Growth Yield ◽

Zingiber Officinale ◽

Marginal Areas ◽

Randomized Block Design ◽

Pollution Research ◽

Factor Ii ◽

Number Of Leaves ◽

Use Efficiency

ABSTRAK Penggunaan varietas jahe yang responsif terhadap pemupukan dosis rendah, diharapkan mampu meningkatkan efisiensi pemupukan dan menekan pencemaran lingkungan. Penelitian dengan tujuan untuk mengetahui respon lima aksesi jahe putih kecil terhadap pemupukan dosis rendah telah dilaksanakan di Kebun Percobaan Cimanggu pada bulan Agustus 2009 sampai Mei 2010. Lima aksesi jahe putih kecil dari daerah marginal ditanam dalam polibag dan disusun menggunakan rancangan acak kelompok yang diulang 3 kali. Setiap perlakuan terdiri atas 20 tanaman. Dua perlakuan yang diuji secara faktorial adalah, faktor I adalah 5 aksesi jahe putih kecil, yaitu (1) Ziof 0004, (2) Ziof 0007, (3) Ziof 0008, (4) Ziof 0013, dan (5) Ziof 0014, dan faktor II adalah dosis pupuk, yaitu (a) 50% dosis anjuran (200 kg/ha urea + 150 kg/ha SP-36 + 150 kg/ha KCl), (b) 75% dosis anjuran (300 kg/ha urea + 225 kg/ha SP-36 + 225 kg/ha KCl), dan (c) dosis anjuran (400 kg/ha urea + 300 kg/ha SP-36 + 300 kg/ha KCl). Masing-masing perlakuan diberi pupuk kandang sebagai pupuk dasar dengan dosis 20 t/ha. Pengamatan dilakukan terhadap parameter pertumbuhan (tinggi tanaman, jumlah anakan, diameter batang, dan jumlah daun), hasil dan serapan unsur hara N, P, dan K pada umur 4 BST dan 9 BST. Hasil penelitian menunjukkan bahwa masing-masing aksesi memberikan respon yang berbeda terhadap penurunan dosis pupuk, baik pada fase pertumbuhan maupun produksi tanaman jahe. Pengurangan dosis pupuk sampai 25% tidak mengurangi produksi jahe, tetapi penurunan dosis pupuk sampai 50% dari dosis rekomendasi menyebabkan penurunan produksi jahe secara nyata. Komposisi unsur hara N, P, dan K yang diserap berbeda pada setiap fase pertumbuhan tanaman. Kata kunci : Aksesi, Zingiber officinale, pemupukan, pertumbuhan, produksiABSTRACT Response of five accessions of small white ginger to fertilizers The use of ginger varieties responsive to low fertilization dosages, is expected to increase fertilizer use efficiency and reduce environmental pollution. Research aimed at observing response of five small white ginger accessions of low-dosage fertilization has been conducted in the Cimanggu Experimental Station in from August 2009 through May 2010. Five small white ginger accessions from marginal areas were planted in polybags. The experiment was and arranged using a randomized block design was repeated with 3 times replications. Each treatment consisted of 20 plants. Two treatments were tested factorially, where factor I : 5 small white ginger accessions, namely (1) Ziof 0004, (2) Ziof 0007, (3) Ziof 0008, (4) Ziof 0013, and (5) Ziof 0014, and factor II : 3 fertilization dosages is dosage of fertilizer, namely (a) 50% recommendation dosage (200 kg urea + 150 kg SP-36 + 150 kg KCl per hectare), (b) 75% recommendation dosage (300 kg urea + 225 kg SP-36 + 225 kg KCl per hectare), and (c) recommendation dosage (400 kg Urea + 300 kg SP-36 + 300 kg KCl per hectare). Each treatment was given 20 t/ha of manure as basal fertilizer. The parameters observed were growth parameters (plant height, number of tillers, stem diameter, and number of leaves), yield and nutrient uptake of N, P, and K at 4 and 9 months after planting (MAP). The results showed that each of the accessions responded differently to the reduction of fertilizer dosages, either in vegetative or generative growth phase of ginger plants. Reduction of fertilizer dosages to 25% did not significantly reduce the yield of ginger, however, fertilizer dosages reduction up to 50% of the recommended dosages led to significant decrease of ginger yield. Compositions of N, P, and K nutrients absorbed by plants were different in every phase of plant growth. Keywords : Accessions, Zingiber officinale, fertilizer, growth, yield

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Effects of silicate application on soil fertility and wheat yield

Semina Ciências Agrárias ◽

10.5433/1679-0359.2015v36n6supl2p4071 ◽

2015 ◽

Vol 36 (6Supl2) ◽

pp. 4071 ◽

Cited By ~ 4

Author(s):

Marcos Vinícius Mansano Sarto ◽

Maria do Carmo Lana ◽

Leandro Rampim ◽

Jean Sérgio Rosset ◽

Jaqueline Rocha Wobeto

Keyword(s):

Grain Yield ◽

Block Design ◽

Wheat Yield ◽

Chemical Properties ◽

Magnesium Silicate ◽

Exchange Capacity ◽

Soil Chemical Properties ◽

Randomized Block Design ◽

Fe And Mn ◽

Calcium Magnesium

An improvement in soil chemical properties and crop development with silicate application has been confirmed in several plant species. The effects of silicate application on soil chemical properties and wheat growth were investigated in the present study. The experiment was carried out in 8-L plastic pots in a greenhouse. Treatments were arranged in a randomized block design in a 3 × 5 factorial: three soils [Rhodic Acrudox (Ox1), Rhodic Hapludox (Ox2) and Arenic Hapludult (Ult)] and five silicate rates (0, 1, 2, 4 and 6 Mg ha–1 of calcium/magnesium silicate), with four replications. The plant length, number of spikes per pot, shoot dry matter and grain yield, were measured after 115 days of wheat (Triticum aestivum L.) growth. Changes in the soil chemical properties (pH, H+ + Al3+, Al3+, P, K, Ca, Mg, Si, Cu, Zn, Fe and Mn) were analyzed after wheat harvest. Application of calcium/magnesium silicate reduces the potential acidity (H+ + Al3+) and Al3+ phytotoxic; and increases the soil pH, available Ca, Mg and Si, cation exchange capacity (CEC) and soil base saturation. Silicate application did not affect the available P, exchangeable K and availability of micronutrients (Cu, Zn, Fe and Mn) in the three soils. The application of calcium/magnesium silicate in an acid clayey Rhodic Hapludox improves the development and yield of wheat; however, the silicate application in soil with pH higher to 5.3 and high Si availability does not affect the agronomic characteristics and grain yield of wheat.

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Influences of two CO2 concentrations and water availability on bean crop

Engenharia Agrícola ◽

10.1590/s0100-69162013000400012 ◽

2013 ◽

Vol 33 (4) ◽

pp. 730-738 ◽

Cited By ~ 2

Author(s):

João B. L. da Silva ◽

Paulo A. Ferreira ◽

Luanna C. Pires ◽

Eduardo G. Pereira ◽

José E. S. Carneiro

Keyword(s):

Drought Stress ◽

Water Availability ◽

Dry Matter ◽

Block Design ◽

Leaf Temperature ◽

High Co2 ◽

Tukey Test ◽

Randomized Block Design ◽

Use Efficiency ◽

Bean Crop

This study was carried out to determine some physiological and phenological responses of the bean under high [CO2] and drought stress. The experiment was conducted from April to July 2009 in Viçosa, Brazil. The open-top chambers were used to enrich the air with CO2, whereas the drought stress was applied between the flowering and the ripening. The randomized block design was used, with four replicates in the subplots. The following plots were [CO2] at 700ppm (F1) and [CO2] environmental (F2) and the subplots were well watering (S1) and drought stress (S2). The results were subjected to Anova and the Tukey test (P < 0.05). For the treatments F1S1 and F1S2 the photosynthetic rate showed increments of 59% and the transpiration reduction of 12%. The yield, leaf temperature and stomatal conductance were not significant different to high [CO2], different from the dry matter, who showed increment of 20% (F1S1) and the water use efficiency who showed increase of 90% for high [CO2]. The osmotic potential was lower in plants under drought stress (F2S2 and F1S2), followed by plants under high [CO2] (F1S1). Despite the increment in photosynthesis, high [CO2] does not guarantee higher yield.

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PERFORMANCE PRODUTIVA DE CULTIVARES DE MILHO EM TRÊS SISTEMAS DE CULTIVO NO LESTE MARANHENSE

Revista Brasileira de Milho e Sorgo ◽

10.18512/rbms.v15i3.654 ◽

2017 ◽

Vol 15 (3) ◽

pp. 520

Author(s):

FRANCISCO CHARLES DOS SANTOS SILVA ◽

MARIA DA CRUZ CHAVES LIMA MOURA ◽

JOSÉ RONEILSON SILVA COSTA ◽

EGON BASTOS DE OLIVEIRA ◽

ITALO JHONNY COSTA

Keyword(s):

Zea Mays ◽

Zea Mays L ◽

Block Design ◽

Cropping System ◽

Farming Systems ◽

Correct Choice ◽

Local Conditions ◽

Maize Cultivars ◽

Randomized Block Design ◽

The City

RESUMO – O Leste Maranhense corresponde à mais nova fronteira agrícola do Brasil. Entretanto, fatores limitantesda produtividade, como a escolha correta da variedade e o sistema de cultivo mais adequado para as condições locais,ainda são desconhecidos. Objetivou-se estudar o desempenho produtivo de 17 genótipos de milho, sob três sistemasde cultivo para a região. Foram realizados dois experimentos, um na cidade de Chapadinha e outro na cidade de Brejo,sendo avaliados 17 genótipos ao todo. Os ensaios foram dispostos no delineamento em blocos casualisados com quatrorepetições em esquema fatorial 3x10 [10 cultivares e três sistemas de cultivo (plantio com cobertura de palha decarnaúba; plantio sem cobertura; plantio intercalado com feijão caupi)]. O sistema de cultivo com palha de carnaúba,independentemente do genótipo de milho e do local de avaliação, proporcionou os maiores rendimentos de grãos.Em Chapadinha, os genótipos mais produtivos foram as variedades de polinização aberta Caiano e Al-Bandeirante,o híbrido duplo AGN 1051, os híbridos triplos 2B 433, BRS 3060 e CMS 3E482 e o híbrido simples P 3646 H. ParaBrejo, os melhores resultados foram obtidos pelos híbridos duplos 2B 707 HX e AGN 1051 e pelos híbridos simples2B 604 HX, 30 F35 H e P 3646 H.Palavras-chave: Zea mays L., Palhada, Rendimento de grãos.PRODUCTIVE PERFORMANCE OF MAIZE CULTIVARS IN THREE FARMING SYSTEMS IN EAST MARANHÃO STATEABSTRACT - East Maranhão State is the newest agricultural frontier in Brazil. However, productivity limiting factorssuch as the correct choice of variety and the cropping system more suitable to the local conditions are still unknown.The objective of this study was to evaluate the productive performance of 17 maize genotypes under three cultivationsystems for the region. Two experiments were carried out, one in the city of Chapadinha and another in the city ofBrejo, evaluating 17 genotypes. The trials were arranged in a randomized block design with 4 replications in a 3x10factorial scheme [10 cultivars and 3 cultivation systems (planting with cover of carnaúba straw, plantation withoutcover, intercropping with cowpea). The use of carnaúba straw provided the highest grain yields, regardless the maizegenotype and the evaluation site,. In Chapadinha the most productive genotypes were the open-pollinated varietiesCaiano and Al-Bandeirante, the double hybrid AGN 1051, the triple hybrids 2B 433, BRS 3060 and CMS 3E482 andthe simple hybrid P 3646 H. For Brejo the best results were obtained by the double hybrids 2B 707 HX and AGN 1051and by the simple hybrids 2B 604 HX, 30 F35 H and P 3646 H.Keywords: Zea mays L., Straw, Grain Yield.

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Performance of ginger crop under different irrigation depths

Bioscience Journal ◽

10.14393/bj-v36n3a2020-47717 ◽

2020 ◽

Vol 36 (3) ◽

Author(s):

Caroline Merlo Meneghelli ◽

Marcelo Rodrigo Krause ◽

Juniomar Schmidt ◽

João Nacir Colombo ◽

Gustavo Haddad Souza Vieira

Keyword(s):

Water Supply ◽

Block Design ◽

Experimental Unit ◽

Crop Evapotranspiration ◽

Total Water ◽

Average Mass ◽

Randomized Block Design ◽

Use Efficiency ◽

Export Quality ◽

Santa Maria

In order to achieve good yields and profitability from ginger crops, the water supply must be adequate. However, there are few studies available which have evaluated the adequate water supply to this vegetable. The objective of this study was to evaluate the effect of different irrigation depths on the development and productivity of ginger plants. The research was conducted at the "Sítio Schmidt" farm located in the municipality of Santa Maria de Jetibá, in the central mountainous region of Espírito Santo State, Brazil. The experimental design was a randomized block design with four replications, each experimental unit consisting of three rows at a spacing of 0.90 m and 0.10 m between plants of two meters extension, totaling 20 experimental units. The treatments consisted of application of five irrigation depths equivalent to: 50%, 75%, 100%, 125% and 150% of crop evapotranspiration (ETc). We evaluated the number of sprouts; average mass of export quality rhizome; the production of export, small and total rhizomes (t ha-1); and water use efficiency. The total water depth applied in the range 1100–1200 mm per cycle favors the development of ginger plants, providing the highest yields of total and export rhizomes, the greatest average mass of export quality rhizome and lowest production of small rhizomes.

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